Investors should buy commodities on Chinese demand and rising oil prices in the coming year, according to Goldman Sachs.

"Historically, when the US and Chinese output gap closes and inflation begins to rise, this has been a buy signal for commodities. We believe the recent reacceleration in global PMIs suggests commodity markets are entering a cyclically stronger environment," Jeffrey Currie, global head of commodities research at Goldman Sachs, wrote in a note to clients Monday.